A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design software for prestressed CFRP strips
Prestressed CFRP strips allow higher exploitation of the FRP tensile strength and so a more economical use of the expensive material. Additionally, serviceability of the structure is improved more effectively by introducing a prestressing force and bending moment, counteracting the external loads. Since the prestressing force of the FRP strip cannot be anchored to the concrete by adhesive bond alone, mechanical anchoring devices are necessary. As the prestressing force, applied before the adhesive hardens, does not stress the adhesive bond, the tensile strength of the expensive CFRP can be exploited more economically than in unstressed strips. A new prestressing system, using conventional CFRP strips, steel anchor plates with self-undercutting anchor bolts is presented. The end anchorage of the strip is ensured by a combination of dowel action and increased adhesive bond due to the self-induced passive clamping force. The paper explains the mechanical principles and technical features of the system. Additionally a comprehensive but easy to use design software is presented, which considers the requirements of different national concrete design codes and FRP guidelines. The prestressing system is expected to be officially approved in Germany by the end of 2007.
Design software for prestressed CFRP strips
Prestressed CFRP strips allow higher exploitation of the FRP tensile strength and so a more economical use of the expensive material. Additionally, serviceability of the structure is improved more effectively by introducing a prestressing force and bending moment, counteracting the external loads. Since the prestressing force of the FRP strip cannot be anchored to the concrete by adhesive bond alone, mechanical anchoring devices are necessary. As the prestressing force, applied before the adhesive hardens, does not stress the adhesive bond, the tensile strength of the expensive CFRP can be exploited more economically than in unstressed strips. A new prestressing system, using conventional CFRP strips, steel anchor plates with self-undercutting anchor bolts is presented. The end anchorage of the strip is ensured by a combination of dowel action and increased adhesive bond due to the self-induced passive clamping force. The paper explains the mechanical principles and technical features of the system. Additionally a comprehensive but easy to use design software is presented, which considers the requirements of different national concrete design codes and FRP guidelines. The prestressing system is expected to be officially approved in Germany by the end of 2007.
Design software for prestressed CFRP strips
Design-Software für vorgespannte CFRP (kohlenstofffaserverstärkten Kunststoff)-Streifen
Berg, W. vom (author) / Dabrowski, I. (author) / Scherer, J. (author)
2008
6 Seiten, 4 Bilder, 4 Quellen
Conference paper
English
Design-Software , mechanische Vorspannung , Kohlenstofffaser , kohlenstofffaserverstärkter Kunststoff , kohlenstofffaserverstärkter Beton , Festigkeitserhöhung , Biegemoment , Biegebeanspruchung , Zugspannung , Vorspannen , vorgefertigtes Teil , Verankerung (mechanische Befestigung) , Klebebondieren , Dehnungsmessung , Klebverbindung , Klebetechnik , Beton
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